Load the datasets

library(tidyverse)
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v tibble  3.1.2     v dplyr   1.0.7
v tidyr   1.1.3     v stringr 1.4.0
v readr   2.0.0     v forcats 0.5.1
-- Conflicts ----------------------------------------------------------------------------- tidyverse_conflicts() --
x dplyr::filter() masks stats::filter()
x dplyr::lag()    masks stats::lag()
library(janitor)

Attaching package: ‘janitor’

The following objects are masked from ‘package:stats’:

    chisq.test, fisher.test
library(here)
here() starts at E:/Prathiba_Course/_codeclan/my_projects/phs_covid/analysis
library(ggplot2)
library(lubridate)

Attaching package: ‘lubridate’

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    date, intersect, setdiff, union
library(plotly)
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library(fable)
Warning: package ‘fable’ was built under R version 4.1.1
Loading required package: fabletools
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library(tsibble)
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Attaching package: ‘tsibble’

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library(tsibbledata)
Warning: package ‘tsibbledata’ was built under R version 4.1.1
## ---------------------------------------------------------------------------
#Load all the datafiles into dataset using loop
## ---------------------------------------------------------------------------

## List the files.

setwd("../raw_data")
Warning: The working directory was changed to E:/Prathiba_Course/_codeclan/my_projects/phs_covid/raw_data inside a notebook chunk. The working directory will be reset when the chunk is finished running. Use the knitr root.dir option in the setup chunk to change the working directory for notebook chunks.
files <- list.files(pattern=".csv")
## read data using loop
for (f in files) {
  file_name <- str_to_lower(str_replace(f,".csv",""))
  assign(paste(file_name),read_csv(f))
}
Rows: 25620 Columns: 18
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr (8): Country, Sex, SexQF, AgeGroup, AgeGroupQF, Dose, PercentCoverageQF, CumulativePercentCoverageQF
dbl (6): Date, Population, NumberVaccinated, PercentCoverage, CumulativeNumberVaccinated, CumulativePercentCove...
lgl (4): PopulationQF, DoseQF, NumberVaccinatedQF, CumulativeNumberVaccinatedQF

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 419070 Columns: 20
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr (10): HB, HBQF, HBName, Sex, SexQF, AgeGroup, AgeGroupQF, Dose, PercentCoverageQF, CumulativePercentCoverageQF
dbl  (6): Date, Population, NumberVaccinated, PercentCoverage, CumulativeNumberVaccinated, CumulativePercentCov...
lgl  (4): PopulationQF, DoseQF, NumberVaccinatedQF, CumulativeNumberVaccinatedQF

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 865590 Columns: 20
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr (9): CA, CAName, Sex, SexQF, AgeGroup, AgeGroupQF, Dose, PercentCoverageQF, CumulativePercentCoverageQF
dbl (6): Date, Population, NumberVaccinated, PercentCoverage, CumulativeNumberVaccinated, CumulativePercentCove...
lgl (5): CAQF, PopulationQF, DoseQF, NumberVaccinatedQF, CumulativeNumberVaccinatedQF

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 4270 Columns: 10
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr (4): Country, Product, Dose, AgeBand
dbl (6): Date, Population, NumberVaccinated, PercentCoverage, CumulativeNumberVaccinated, CumulativePercentCove...

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 32 Columns: 15
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr  (2): CA, CAName
dbl (13): Date, TotalTests, TotalTestsNew, PositiveTests, PositiveTestsNew, PositivePercentageTotal, PositivePe...

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 15 Columns: 15
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr  (2): HB, HBName
dbl (13): Date, TotalTests, TotalTestsNew, PositiveTests, PositiveTestsNew, PositivePercentageTotal, PositivePe...

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 19403 Columns: 14
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr (5): Country, Sex, SexQF, AgeGroup, AgeGroupQF
dbl (9): Date, DailyPositive, CumulativePositive, CrudeRatePositive, DailyDeaths, CumulativeDeaths, CrudeRateDe...

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 18807 Columns: 21
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr  (2): CA, CAName
dbl (19): Date, DailyPositive, CumulativePositive, CrudeRatePositive, CrudeRate7DayPositive, DailyDeaths, Cumul...

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 8811 Columns: 25
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr  (4): HB, HBName, HospitalAdmissionsQF, ICUAdmissionsQF
dbl (21): Date, DailyPositive, CumulativePositive, CrudeRatePositive, CrudeRate7DayPositive, DailyDeaths, Cumul...

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 658923 Columns: 10
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr (7): IntZone, IntZoneName, CA, CAName, Positive7DayQF, CrudeRate7DayPositive, CrudeRate7DayPositiveQF
dbl (3): Date, Positive7Day, Population

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
Rows: 2940 Columns: 11
-- Column specification -------------------------------------------------------------------------------------------
Delimiter: ","
chr  (1): Country
dbl (10): Date, SIMDQuintile, DailyPositive, CumulativePositive, CrudeRatePositive, DailyDeaths, CumulativeDeat...

i Use `spec()` to retrieve the full column specification for this data.
i Specify the column types or set `show_col_types = FALSE` to quiet this message.
# Function to create a theme for the plot-----------------------------------------
color_theme <- function() {
  theme(
    plot.background = element_rect(fill = "white"),
    plot.title = element_text(size = rel(2)),
    plot.title.position = "plot",
    panel.border = element_rect(colour = "blue", fill = NA, linetype = 1),
    panel.background = element_rect(fill = "white"),
    panel.grid = element_line(colour = "grey85", linetype = 1, size = 0.5),
    axis.text = element_text(colour = "blue", face = "italic", size = 12),
    axis.title.y = element_text(colour = "#1B732B", size = 10, angle = 90),
    axis.title.x = element_text(colour = "#1B732B", size = 10),
    legend.box.background = element_rect(),
    legend.box.margin = margin(6, 6, 6, 6)
  )
}

1) Analyse the Daily trend on positive cases

trend_hb_daily <- trend_hb_20211008 %>% 
  clean_names()
#Convert the date to date format
trend_hb_daily <- trend_hb_daily %>% 
  mutate(date = as_date(ymd(date))) %>% 
  filter (year(date) == 2021)
  #filter(date >="2021-04-01") 

Plot1(a): Trend on people who tested positive (For all the data).

#Plot to visualise trend on positive cases.
x <- trend_hb_daily %>% 
  filter (hb_name == "Scotland") %>% 
  ggplot()+
  aes(x = date, y = daily_positive)+
  geom_line()+
  #scale_x_date(breaks = "1 month")+
  scale_x_date(breaks = "1 month", date_labels = "%b - %y" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))+
  ggtitle("Trend on Positive cases") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  color_theme()

ggplotly(x)
NA
NA

Plot1(b): Trend on people who tested positive(For Past 6 months).

x <- trend_hb_daily %>% 
  filter(date >="2021-04-01") %>% 
  filter (hb_name == "Scotland") %>% 
  ggplot()+
  aes(x = date, y = daily_positive)+
  geom_line()+
  #scale_x_date(breaks = "1 month")+
  scale_x_date(breaks = "1 month", date_labels = "%b - %y" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))+
  ggtitle("People tested Positive") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  color_theme()

ggplotly(x)

EXTRA 1: Forecast on Positive cases:

trend <- trend_hb_daily %>% 
  filter (hb_name == "Scotland") %>% 
  filter(date >="2021-06-01") %>% 
  select(date, daily_positive)

trend <- as_tsibble(trend, index = date)

fit <- trend %>%
  model(
    snaive = SNAIVE(daily_positive),
    mean_model = MEAN(daily_positive),
    arima = ARIMA(daily_positive)
  )
forecast_14days <- fit %>%
  fabletools::forecast(h = 14)
forecast_14days
forecast_14days %>%
 #filter(.model == "snaive") %>%
 autoplot(trend, level = NULL) +
  ggtitle("Forecasts for Positive cases for 2 weeks") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  guides(colour = guide_legend(title = "Forecast"))+
  scale_x_date(breaks = "1 month", date_labels = "%B" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))

forecast_1month <- fit %>%
  fabletools::forecast(h = "1 month")
forecast_1month 
forecast_1month %>%
 #filter(.model == "snaive") %>%
 autoplot(trend, level = NULL) +
  ggtitle("Forecasts for Positive cases for one month") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  guides(colour = guide_legend(title = "Forecast"))+
  scale_x_date(breaks = "1 month", date_labels = "%B" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))

# check our available years so we know where to put the split in the data

# Now set our training data from 1992 to 2006
train <- trend %>%
  filter_index("2021-01-01" ~ "2021-08-31")

# run the model on the training set 
fit_train <- train %>%
  model(
    mean_model = MEAN(daily_positive),
    arima = ARIMA(daily_positive),
    snaive = SNAIVE(daily_positive)
  )

forecast_test <- fit_train %>% 
  fabletools::forecast(h = 30)
forecast_test %>%
  autoplot(train, level = NULL) +
    autolayer(filter_index(trend, "2021-09-01" ~.), color = "black") +
    ggtitle("Forecasts for positive cases") +
    xlab("Date") + ylab("Daily Positive") +
    guides(colour=guide_legend(title="Forecast"))
Plot variable not specified, automatically selected `.vars = daily_positive`

accuracy_model <- fabletools::accuracy(forecast_test, trend)

accuracy_model %>% 
  select(-.type) %>%
  arrange(RMSE)

2 Analyse the trend on Hospitalisations:

plot_hosp <- trend_hb_daily %>% 
  filter(date >="2021-04-01") %>% 
  filter (hb_name == "Scotland") %>% 
  filter(!(is.na(hospital_admissions))) %>% 
  ggplot()+
  aes(x = date, y = hospital_admissions)+
  geom_col()+
  #scale_x_date(breaks = "1 month")+
  scale_x_date(breaks = "1 week", date_labels = "%d - %b" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))+
  ggtitle("Trend on Hospitalisations") +
  xlab("Date (months)") +
  ylab("No of patients admitted") +
  color_theme()

ggplotly(plot_hosp)
NA

2 (b) Forecast on Hospitalisation:**

Using 6 months of data ( Two - Wave)

forecast_14days %>%
# filter(.model == "snaive") %>%
 autoplot(trend_hosp, level = NULL) +
  ggtitle("Forecasts for Hospital admissions cases for 2 weeks") +
  xlab("Year") +
  ylab("No of patients admitted") +
  guides(colour = guide_legend(title = "Forecast"))+
  scale_x_date(breaks = "1 month", date_labels = "%B" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))

NA
NA
NA
NA
forecast_1month <- fit %>%
  fabletools::forecast(h = "1 month")
forecast_1month 
forecast_1month %>%
 filter(.model %in% c("snaive","arima")) %>%
 autoplot(trend_hosp, level = NULL) +
  ggtitle("Forecasts for Hospitalisation for one month") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  guides(colour = guide_legend(title = "Forecast"))+
  scale_x_date(breaks = "1 month", date_labels = "%B" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))

#  set the training data
train <- trend_hosp %>%
  filter_index("2021-06-01" ~ "2021-08-31")

# run the model on the training set 
fit_train <- train %>%
  model(
    mean_model = MEAN(hospital_admissions),
    arima = ARIMA(hospital_admissions),
    snaive = SNAIVE(hospital_admissions),
    ets = ETS(log(hospital_admissions) ~ error("M") + trend("Ad") + season("A"))
  )

forecast_test <- fit_train %>% 
  fabletools::forecast(h = 35)
forecast_test %>%
  filter(.model %in% c("arima","snaive")) %>%
  autoplot(train ) +
    autolayer(filter_index(trend_hosp, "2021-06-01" ~.), color = "black") +
    ggtitle("Forecasts for Hospitalisations") +
    facet_wrap(~.model)+
    xlab("Date") + 
    ylab("No of Patients admitted") +
    guides(colour=guide_legend(title="Forecast"))
Plot variable not specified, automatically selected `.vars = hospital_admissions`

accuracy_model <- fabletools::accuracy(forecast_test, trend_hosp)
Warning: The future dataset is incomplete, incomplete out-of-sample data will be treated as missing. 
1 observation is missing at 2021-10-05
accuracy_model %>% 
  select(-.type) %>%
  arrange(RMSE)

Prepare the data

daily_vacc_hb <- daily_vacc_hb_20211009 %>% 
  clean_names()
 #Convert the date to date format
daily_vacc_hb <- daily_vacc_hb %>% 
  mutate(date = as_date(ymd(date)))
  #filter (year(date) == 2021)
daily_vacc_hb_plot <- daily_vacc_hb %>% 
  filter(hb_name == "Scotland") %>% 
  filter(sex =="Total") %>% 
  filter(age_group == "All vaccinations") %>% 
  filter(number_vaccinated!=0) 
  #select(date,sex, age_group, number_vaccinated)

Plot3(a): Trend on people who tested positive (For all the data).

#Plot to visualise trend on positive cases.
plot_vaccine <- daily_vacc_hb_plot %>% 
  ggplot()+
  aes(x = date, y = number_vaccinated)+
  geom_line(aes(color = dose))+
  facet_wrap(~dose)+
  #scale_x_date(breaks = "1 month")+
  scale_x_date(breaks = "1 month", date_labels = "%b - %y" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))+
  ggtitle("Trend on Vaccination") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  color_theme()

ggplotly(plot_vaccine)
---
title: "PHS_Covid Analysis"
output: html_notebook
---

### **Load the datasets**

```{r}
library(tidyverse)
library(janitor)
library(here)
library(ggplot2)
library(lubridate)
library(plotly)
library(fable)
library(tsibble)
library(tsibbledata)
```

```{r}
## ---------------------------------------------------------------------------
#Load all the datafiles into dataset using loop
## ---------------------------------------------------------------------------

## List the files.

setwd("../raw_data")
files <- list.files(pattern=".csv")
## read data using loop
for (f in files) {
  file_name <- str_to_lower(str_replace(f,".csv",""))
  assign(paste(file_name),read_csv(f))
}
```

```{r}
# Function to create a theme for the plot-----------------------------------------
color_theme <- function() {
  theme(
    plot.background = element_rect(fill = "white"),
    plot.title = element_text(size = rel(2)),
    plot.title.position = "plot",
    panel.border = element_rect(colour = "blue", fill = NA, linetype = 1),
    panel.background = element_rect(fill = "white"),
    panel.grid = element_line(colour = "grey85", linetype = 1, size = 0.5),
    axis.text = element_text(colour = "blue", face = "italic", size = 12),
    axis.title.y = element_text(colour = "#1B732B", size = 10, angle = 90),
    axis.title.x = element_text(colour = "#1B732B", size = 10),
    legend.box.background = element_rect(),
    legend.box.margin = margin(6, 6, 6, 6)
  )
}
```

## **1) Analyse the Daily trend on positive cases**

```{r}
trend_hb_daily <- trend_hb_20211008 %>% 
  clean_names()
```

```{r}
#Convert the date to date format
trend_hb_daily <- trend_hb_daily %>% 
  mutate(date = as_date(ymd(date))) %>% 
  filter (year(date) == 2021)
  #filter(date >="2021-04-01") 
```

### ***Plot1(a): Trend on people who tested positive (For all the data).***

```{r}
#Plot to visualise trend on positive cases.
x <- trend_hb_daily %>% 
  filter (hb_name == "Scotland") %>% 
  ggplot()+
  aes(x = date, y = daily_positive)+
  geom_line()+
  #scale_x_date(breaks = "1 month")+
  scale_x_date(breaks = "1 month", date_labels = "%b - %y" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))+
  ggtitle("Trend on Positive cases") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  color_theme()

ggplotly(x)


```

### ***Plot1(b): Trend on people who tested positive(For Past 6 months).***

```{r}
x <- trend_hb_daily %>% 
  filter(date >="2021-04-01") %>% 
  filter (hb_name == "Scotland") %>% 
  ggplot()+
  aes(x = date, y = daily_positive)+
  geom_line()+
  #scale_x_date(breaks = "1 month")+
  scale_x_date(breaks = "1 month", date_labels = "%b - %y" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))+
  ggtitle("People tested Positive") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  color_theme()

ggplotly(x)
```

## **EXTRA 1: Forecast on Positive cases:**

```{r}
trend <- trend_hb_daily %>% 
  filter (hb_name == "Scotland") %>% 
  filter(date >="2021-06-01") %>% 
  select(date, daily_positive)

trend <- as_tsibble(trend, index = date)

fit <- trend %>%
  model(
    snaive = SNAIVE(daily_positive),
    mean_model = MEAN(daily_positive),
    arima = ARIMA(daily_positive)
  )
forecast_14days <- fit %>%
  fabletools::forecast(h = 14)
forecast_14days
```

```{r}
forecast_14days %>%
 #filter(.model == "snaive") %>%
 autoplot(trend, level = NULL) +
  ggtitle("Forecasts for Positive cases for 2 weeks") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  guides(colour = guide_legend(title = "Forecast"))+
  scale_x_date(breaks = "1 month", date_labels = "%B" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))
```

```{r}
forecast_1month <- fit %>%
  fabletools::forecast(h = "1 month")
forecast_1month 
```

```{r}
forecast_1month %>%
 #filter(.model == "snaive") %>%
 autoplot(trend, level = NULL) +
  ggtitle("Forecasts for Positive cases for one month") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  guides(colour = guide_legend(title = "Forecast"))+
  scale_x_date(breaks = "1 month", date_labels = "%B" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))

```
```{r}
# check our available years so we know where to put the split in the data

# Now set our training data from 1992 to 2006
train <- trend %>%
  filter_index("2021-01-01" ~ "2021-08-31")

# run the model on the training set 
fit_train <- train %>%
  model(
    mean_model = MEAN(daily_positive),
    arima = ARIMA(daily_positive),
    snaive = SNAIVE(daily_positive)
  )

forecast_test <- fit_train %>% 
  fabletools::forecast(h = 30)

```

```{r}
forecast_test %>%
  autoplot(train, level = NULL) +
    autolayer(filter_index(trend, "2021-09-01" ~.), color = "black") +
    ggtitle("Forecasts for positive cases") +
    xlab("Date") + ylab("Daily Positive") +
    guides(colour=guide_legend(title="Forecast"))
```


```{r}
accuracy_model <- fabletools::accuracy(forecast_test, trend)

accuracy_model %>% 
  select(-.type) %>%
  arrange(RMSE)
```


## **2 Analyse the trend on Hospitalisations:**

```{r}
plot_hosp <- trend_hb_daily %>% 
  filter(date >="2021-04-01") %>% 
  filter (hb_name == "Scotland") %>% 
  filter(!(is.na(hospital_admissions))) %>% 
  ggplot()+
  aes(x = date, y = hospital_admissions)+
  geom_col()+
  #scale_x_date(breaks = "1 month")+
  scale_x_date(breaks = "1 week", date_labels = "%d - %b" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))+
  ggtitle("Trend on Hospitalisations") +
  xlab("Date (months)") +
  ylab("No of patients admitted") +
  color_theme()

ggplotly(plot_hosp)

```


## 2 (b) Forecast on Hospitalisation:**

Using 6 months of data ( Two - Wave)

```{r}
trend_hosp <- trend_hb_daily %>% 
  filter (hb_name == "Scotland") %>% 
  filter(date >="2021-06-01") %>% 
  filter(!(is.na(hospital_admissions))) %>% 
  select(date, hospital_admissions)

trend_hosp <- as_tsibble(trend_hosp, index = date)

fit <- trend_hosp %>%
  model(
    snaive = SNAIVE(hospital_admissions),
    mean_model = MEAN(hospital_admissions),
    arima = ARIMA(hospital_admissions),
    ets = ETS(log(hospital_admissions) ~ error("M") + trend("Ad") + season("A"))
  )
forecast_14days <- fit %>%
  fabletools::forecast(h = 14)
forecast_14days
```

```{r}
forecast_14days %>%
# filter(.model == "snaive") %>%
 autoplot(trend_hosp, level = NULL) +
  ggtitle("Forecasts for Hospital admissions cases for 2 weeks") +
  xlab("Year") +
  ylab("No of patients admitted") +
  guides(colour = guide_legend(title = "Forecast"))+
  scale_x_date(breaks = "1 month", date_labels = "%B" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))




```

```{r}
forecast_1month <- fit %>%
  fabletools::forecast(h = "1 month")
forecast_1month 
```

```{r}
forecast_1month %>%
 filter(.model %in% c("snaive","arima")) %>%
 autoplot(trend_hosp, level = NULL) +
  ggtitle("Forecasts for Hospitalisation for one month") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  guides(colour = guide_legend(title = "Forecast"))+
  scale_x_date(breaks = "1 month", date_labels = "%B" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))

```
```{r}
#  set the training data
train <- trend_hosp %>%
  filter_index("2021-06-01" ~ "2021-08-31")

# run the model on the training set 
fit_train <- train %>%
  model(
    mean_model = MEAN(hospital_admissions),
    arima = ARIMA(hospital_admissions),
    snaive = SNAIVE(hospital_admissions),
    ets = ETS(log(hospital_admissions) ~ error("M") + trend("Ad") + season("A"))
  )

forecast_test <- fit_train %>% 
  fabletools::forecast(h = 35)

```

```{r}
forecast_test %>%
  filter(.model %in% c("arima","snaive")) %>%
  autoplot(train ) +
    autolayer(filter_index(trend_hosp, "2021-06-01" ~.), color = "black") +
    ggtitle("Forecasts for Hospitalisations") +
    facet_wrap(~.model)+
    xlab("Date") + 
    ylab("No of Patients admitted") +
    guides(colour=guide_legend(title="Forecast"))
```


```{r}
accuracy_model <- fabletools::accuracy(forecast_test, trend_hosp)

accuracy_model %>% 
  select(-.type) %>%
  arrange(RMSE)
```

Prepare the data
```{r}
daily_vacc_hb <- daily_vacc_hb_20211009 %>% 
  clean_names()
```

```{r}
 #Convert the date to date format
daily_vacc_hb <- daily_vacc_hb %>% 
  mutate(date = as_date(ymd(date)))
  #filter (year(date) == 2021)
```
```{r}
daily_vacc_hb_plot <- daily_vacc_hb %>% 
  filter(hb_name == "Scotland") %>% 
  filter(sex =="Total") %>% 
  filter(age_group == "All vaccinations") %>% 
  filter(number_vaccinated!=0) 
  #select(date,sex, age_group, number_vaccinated)
```


### ***Plot3(a): Trend on people who tested positive (For all the data).***

```{r}
#Plot to visualise trend on positive cases.
plot_vaccine <- daily_vacc_hb_plot %>% 
  ggplot()+
  aes(x = date, y = number_vaccinated)+
  geom_line(aes(color = dose))+
  facet_wrap(~dose)+
  #scale_x_date(breaks = "1 month")+
  scale_x_date(breaks = "1 month", date_labels = "%b - %y" )+
  theme(axis.text.x = element_text(angle = 45, vjust = 1, hjust=1))+
  ggtitle("Trend on Vaccination") +
  xlab("Year") +
  ylab("No of Positive Cases") +
  color_theme()

ggplotly(plot_vaccine)
```



